The data on the thermal biology and daily activity of the Central Asian tortoise Agrionemys horsfiedii have been generalized on the basis of our own research and literature information. A description of the daily activity cycles with the body and environmental temperatures characterized is proposed. There are 8 periods of the daily activity and thermoregulatory behavior. According to our measurement data of the tortoise’s cloacal temperature, their egress from their burrows takes place under a minimum body temperature of 9.4°С and a minimum substrate one of 11.8ºС.